Sliding-door lock.



No. 643,245. Patented Feb. I3, IQOUL J. A.I EASTMAN.

SLIDING DUUR LOCK.

(Application filed May 17, 1899,) (No Model.)

PATENT Prien.

.IOEL A. EASTMAN, OF FRUITVALE, CALIFORNIA, ASSIGNOR TO CHARLES R. EASTMAN, OF SAME PLACE.

SLlDlNG-DOOR LOCK.

SPECIFICATION forming part of Letters Patent No. 643,245, dated February 13, 1900. Application led May 1'7, 1899. Serial No. 717,119. (No model.)

To all whom t may concern.-

Be it known that I, JOEL A. EASTMAN, a citizen of Canada, residing at Fruitvale,county of Alameda, State of California, have invented an Improvement in Door and Sash Locks; and I hereby declare the following to be a full,

clear, and exact description of the same.

My invention relates to a lock which is especially designed for doors, sashes, and other meeting parts which it is desired to secure and lock together.

It consists of the parts and the constructions and combinations of parts, which I will hereinafter describe and claim.

Figure l shows the latch advanced and in position of locking the doors together. Fig. 2 is an elevation showing one side of the lockcase removed and its application to folding doors, the latch being retracted. Fig. 3 is a face view of the keeper. Fig. 4 is a view of key used with this lock.

The object of this invention is to provide a lock which may be used for doors, sashes, and other parts which are to be locked together, and it is especially applicable to folding doors the edges of which are brought together when the doors are closed and which are separated by moving them apart. Such doors are usually provided with a hook-latch or lockingbolt carried by a lock-case which is xed to one section of the door, while the other has a keeper with corresponding slots made in it, into which the locking-bolt is moved by the action of the key. This class of doors being usually large and heavy are apt to settle and get out of line, so that it is very difficult to keep them in condition to be properly locked. It is the object of my invention to overcome this diiiculty by providing for such movements of the locking-bolt as will compensate for any settling of one part of the door or the other, and to do this the locking-bolt is projected forward into the larger portion of the slot of the opposite door, then dropped down until the head is engaged with the narrower portion of the slot, and, finally, it is drawn back against said slotted portion, so that it will draw the doors close together in case they are inclined to separate. In unlocking the door the opposite movement takes place. The bolt is first advanced a little to clear it of engagement with the keeper-slot, then raised to a point `opposite the larger upper portion of the slot, then withdrawn into its own easing on the other door. The mechanism which I have shown for carrying ont this operation is constructed as follows:

A is the part of the lock containing the operative mechanism, which is fixed to the edge of one of the folding-door sections B, and A' is the keeper, which is secured to the opposite section, with slots or openings made in each of the contiguous faces, the upper part of each slot, as shown at C, being of sufficient width to allow the head of the bolt D to be advanced through the openings from one to the other. The shank ofthe bolt is narrower than the head, as shown, and when the bolt is dropped this shank passes into the lower portion C of the slot, where the head D of the bolt being wider than the width of the slot will be prevented from being withdrawn. The rear end of the bolt D is loosely pivoted to a link E by a pin, as shown at d. The lower end of the link E is pivoted to the side of the lock-case, as shownat c, and the locking-bolt D is otherwisedisconnected andindependent.

F is a forked lever-arm fulcrumed to the locking-case, as shown at f. The upper end of this lever-arm has two branches, one of which has a hook F', which is adapted to engage with a lng Gr, projecting from one side of the lock-bolt D. The other branch F2 extends to the left, as shown in the drawings, and passes up on the other side of the lug G.

A spring H is held in place by a pin I in the lock-case, one end of the spring pressing against the edge of the lock-case and the other against the lever F, the tendency of this spring being to hold the hook F over the lug G when the door has been locked, and thus prevent the unlocking of the door without the proper key. Above thebolt D is another spring J, one end of which is fixed, as shown at J', and the other end is adaptedto press upon the top of the bolt D. In the rear of the lock-case is another spring K, against which the rear of the bolt contacts when it is drawn back by the movement of the key so as to compress this spring, and after the key has passed the lug upon which it acts to retract the bolt the spring will again throw the IOO bolt forward, so that the key can engage the other side of the lug when it is turned to again lock the door.

The lower part of the bolt D has formed in it a projection D2, with corresponding concavities L upon each side of this projection.

O is the keyhole, through which the key is inserted.

When the bolt D is withdrawn in the lock, as shown in Fig. 2, the parts will be in the position shown, the forward end of the bolt extending in line with the upper part C of the opening through the edge of the lock, and the lug G on the bolt will be behind and essentially in line with the latch F' of the forked lever, the latter being pressed against it by the action of the spring I-I. When the key is introduced and turned around to lock the door, as shown by the arrows, it first contacts with the right side of the projection D2 of the bolt, and this moves the bolt forward through the contiguous slots C in the two doors until the head D has been carried into the keeper of the opposing door, the action of the upper spring J pressing upon the top of the latch D and the link E swinging to allow it to advance into the position shown in Fig. l. The continued turning of the key will cause it to pass the projection D2 of the bolt. Then the upper spring J presses the bolt down until the head is within the narrow portion C of the keeper, and at the same time .g

the pressure of the spring H will act against the forked lever F so as to push the latch F above the lug G on the bolt, and as the key is turned still further it follows down the curved adjacent side of the forked lever F until it is released therefrom and is brought to the position in line with the keyhole, so that it can be withdrawn, this action at the same time allowing the spring H to act upon the forked lever F, first engaging the latch F with the lug G, and then as the key is entirely withdrawn from its contact with the lever F the spring H -acts to force the lever back, and with it the bolt vD is also drawn back until the head D is pressed against the inside of the narrow slot of the keeper, with a tendency to draw and hold the two doors together. In this position the latch F', engaging with the lug G, prevents any upward movement of the locking-bolt.

To unlock the door when it is in the position shown in Fig. l, the key is inserted and turned to the left, as shown in that figure. Being thus turned, the key first presses against the adjacent side of the lever F and pushes it away, and the arm F2 of the forked lever pressing against the lug G of the bolt will first push the head of the bolt D away from the inner faces of the keeper, in this action compressing the spring II. This movement also disengages the latch F from the lug G, and as the key continues to turn it engages the left side of the projection D2 of the bolt, and thus lifts the bolt until the head D is in line with the larger portion of the slot C of the keeper and also that of the lock-case. The continued movement of the key pressing against the projection D2 withdraws the bolt into its own case, the bolt moving in the same manner about the link E and the spring J pressing upon the top of the bolt, while the spring H, acting upon the forked lever F, causes it to follow the movement of the bolt. As the bolt is finally retracted, the key, still pressing against the projection D2, presses the rear of the bolt against the spring K, which is thus compressed until the key has finally passed the projection D2, when the spring K will act to force the bolt forward slightly, which brings the projection D2 in proper position to be engaged from the opposite side by the key when the doors are to be again locked, the bolt now remaining in its elevated position, as shown in Fig. l.

I have here described my invention as especially applicable to locking folding doors; but it may also be employed to advantage for single doors and as a sash-lock and for other similar purposes, whore the` projection of the bolt and its subsequent depression and retraction serves to lock the parts to which it is connected together, the changes in construction being onlysuch as would be necessary to accommodate the particular construction of the parts to which it is applied.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-- 1. In a lock and in combination with its f case, a locking-bolt and means whereby it has a combined longitudinal and vertical movement, means acting on the bolt for holding the latter in position within the case, and a keeper having an opening into which the end l of the bolt is projected in one movement, said opening having a reduced extension into which the end of the bolt is moved in its other movement, and said bolt having a head wider than its shank whereby it is prevented from being withdrawn endwise from said eXtension.

2. In a lock, a bolt, a swinging link to which the rear end is connected, a lug or projection upon the bolt adapted to be engaged by the bits of the key from either side, a lug projecting from the side of the bolt, and a pivoted swinging latch-bar adapted to engage with the lug and lock the bolt.

3. Ina lock, a bolt, a link having one end pivoted within the case, the other connecting with the bolt, a projection on the edge of the bolt which is engaged by the key to move the bolt forward or back, a spring pressing upon the opposite side of the bolt, normally holding it down, a forked lever pivoted in the case having a lat-ch at its movable end, a lug on the side of the bolt with vwhich said latch engages after the bolt has been moved forward and downward whereby the bolt is locked in place.

4. In a lock, a bolt, a swinging pivoted link to which the rear end of the bolt is connected,

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a spring pressing upon the top of the bolt to normally force it down, a projection upon the lower side of the bolt with which the key engages from one side to force the bolt forward, the spring acting to press it down after it has reached its farthest forward position and has been released from the bits of the key, a forked lever pivoted within the case having a latch upon the upper end, a lug upon the bolt with which said latch engages after the bolt has been depressed and a spring pressing upon said lever to retract the bolt.

5. In a lock, a casing upon one of the parts to be locked'and a keeper upon the other, each having opposing contiguous openings with narrow extensions at the bottom, a bolt, the shank of which is of less thickness than said slotted extensions and having a head adapted to move through the upper and larger portions of the slots and to lock against the lower and narrower portion of the keeper-slot, a link pivoted in the case, with the movable end of which the rear end of the bolt is loosely connected, a spring pressing upon the top of the bolt to normally force it down,a lug projecting from the bottom of the bolt adapted to be engaged by the bits of a key when the latter is turned to force the bolt forward, whereby the head of the bolt is projected into the upper portion of the keeper-slot, said spring acting to depress the head of the bolt into line with the lower and narrower portion of the slot after it has been relieved of the pressure of the key, a forked lever, the lower end of which is pivoted in the lock-case and the upper end provided with a latch upon one member of the fork, a lug upon the side of the bolt with which said latch engages after the head of the bolt has been depressed whereby the bolt is prevented from being again lifted, and a spring pressing against the side of the forked lever to retract the head of the bolt against the inner face of the keeper-slot when the parts are relieved of the pressure of the key.

6. A lock-case fixed to 4,one of the parts to be secured, a slotted keeperiixed to the other part, a bolt movable in the lock-case, a link to which the rear end of the bolt is pivoted, said bolt having a head upon the outer end which is projected through the upper and wider portion of the slot in the keeper when the bolt is moved forward, a spring pressing upon the top of the bolt by which the head is depressed into line with the narrower portion of the slot after the key has been removed, a forked lever, one end of which is pivoted in the lock-case, a latch upon the other endof one of the forks adapted to engage a lug upon the side of the bolt to lock it in its depressed position, a spring pressing against the side of the forked lever to normally press the head of the bolt against the inner face of the keeper-slot, said lever being so disposed with relation to the keyhole that when the key is introduced and turned to unlock the door, it first forces the lever against the tension of the spring, and moves the bolt forward to release it and the keeper a lug upon the bottom of the bolt which is engaged by the further turning of the key to raise the bolt into line with the wider opening of the keeper whereby a further movement of the key retracts the bolt from the keeper into the lock-case, a spring against which the rear end of the bolt contacts when retracted into the lock-case, said spring acting to slightly advance the bolt after the lug has been released from the key whereby the lug is positioned to be again engaged by the key from the opposite side to advance the bolt.

7. In a lock, a bolt, a pivoted swinging link with the free end of which the rear end of the bolt is connected and mechanism connected with the bolt and actuated by the turning of the key whereby the bolt is advanced into the opposing keeper, then depressed to engage the slot therein and finally retracted against the inner face of the keeper andlocked in position.

8. In a lock, a freely-movable bolt, a swinging pivoted link with the free end of which the rear end of the bolt is connected, an enlarged head formed upon the outer end ofthe bolt, a keeper having a slot, the upper portion of which admits the passage of the bolthead, the lower portion being made narrower to admit the shank of the bolt and engage the head thereof when the bolt has been projected and engaged with the keeper, a mechanism actuated by the key whereby the bolt is firstrdisengaged from the locking-latch and moved away from theinner face of the keeper, then raised into line with the upper portion of the keeper-slot, then retracted into the lock-case, and finally positioned to be acted upon by the key from the opposite side when it is to be again advanced to lock the parts.

In witness whereof I have hereunto set my hand.

JOEL A. EASTMAN. Witnesses:

S. H. NoURsE, JEssIn C. BRODIE.

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